Plantilla:ActualCdb:prueba/styles.css

Summary

.cuadro-dias-restantes {
	background: radial-gradient(#e6f0fa, #e6f0fa);
}

html.skin-theme-clientpref-night .cuadro-dias-restantes {
    background: var(--background-color-content-added);
    color: inherit;
}

@media (prefers-color-scheme: dark) {
    html.skin-theme-clientpref-os .cuadro-dias-restantes {
        background: var(--background-color-content-added);
        color: inherit;
    }	
}